Following the announcement Kings of Leon has cancelled their U.S. tour, HollywoodLife.com spoke with an insider who believes Caleb Followill’s dependence on alcohol may be to blame. We hope he’s okay!

Kings of Leon shocked their fans by cancelling the remainder of their U.S. tour Aug. 1, following a disastrous performance in Dallas where frontman Caleb Followill got so sick he has to leave the stage. HollywoodLife.com spoke with an insider who revealed what is most likely the catalyst for the band’s major issues — and we hope Caleb gets the help he needs.

“I think all of this does have to do with Caleb’s alcoholism,” our source said. “He suffers from extreme anxiety and has a hard time standing in front of crowds, which is why it’s so ironic he’s become one of the world’s largest rock stars.”

The insider added, “There’s a running joke in the band that Caleb can’t go on stage without having a cocktail first.”

Partying is a major component of becoming and living the life of a rock star, so it’s understandable how someone like 29-year-old Caleb could wind up in this situation. That said, we hope he’s taking the next couple months before the band’s international tour to regroup and work on his issues.

His younger brother, Jared, tweeted about the band’s decision to cancel the tour, writing, “Utterly depressed. It’s completely out of my hands. Family has to come 1st. If bass solos & backing vocals were more popular, I’d be there.”

Minutes later, he added, “Thanks to all my friends, family, & fans. I’m not going to stop working. I’m going to spend time writing songs and looking to the future.”